Question: Which is the puppet state of the capital of Vilnius?
Paraphrase: Which is the manikin state of the capital of Vilnius?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P36 wd:Q216 . ?sbj wdt:P31 wd:Q208164 } 
Answer: Lithuanian–Belorussian Soviet Socialist Republic